Year	current US$
1970	488602693.397026
1971	594473881.393522
1972	699991540.117484
1973	859908695.4697
1974	982037815.236414
1975	1197089254.99078
1976	1268895919.13248
1977	1310655943.98944
1978	1650099294.90624
1979	1811724430.31131
1980	1980531583.0779
1981	2019592325.59408
1982	2108434425.18672
1983	2241756830.95923
1984	2432161834.13402
1985	2463856832.72533
1986	2632803600.0635
1987	2739664891.09434
1988	3001229481.26337
1989	2923722084.62316
1990	2980447080.18693
1991	2559189877.57312
1992	2310876146.0363
1993	2252085277.39291
1994	2900509208.21445
1995	3383625283.16444
1996	2870254838.94213
1997	2947733945.83288
1998	3009131820.54797
1999	3363924407.56836
2000	3630719083.58377
2001	3746963701.23676
2002	3901226866.74576
2003	4084418400.44485
2004	4343388047.26575
2005	4771774625.62699
2006	5333963115.17716
2007	5991615483.24588
2008	6312790358.60577
2009	6499239614.90606
2010	7072536092.73915
2011	8129583281.90284
2012	8772739031.84843
2013	9233647980.24167
2014	9611230948.34576
2015	10621948294.0744
2016	11331627443.2823
2017	12127971610.8718
2018	12568777495.9679
2019	12807039983.0778
2020	13309665247.7784